[BUG] Dispatch pairing fails every attempt — Windows 11 Home, Build 26200

Preflight Checklist

• [x] I have searched existing issues — found #57745 (same symptom, Windows 11 25H2, closed by stale-bot without resolution, not actually fixed)
• [x] This is a single bug report
• [x] I am using the latest version of Claude Desktop

What's Wrong?

Dispatch has never successfully paired on this device. Every attempt from the Claude mobile app results in "ペアリングに失敗しました" (Pairing failed), with no further error detail shown on either device.

What Should Happen?

Mobile app should pair successfully with Claude Desktop for Dispatch sessions.

Steps to Reproduce

1. Open Claude Desktop on Windows, confirm Dispatch toggle is ON (Settings → Cowork)
2. Confirm same account signed in on both mobile and desktop
3. Open Claude mobile app → Cowork → Dispatch
4. Attempt to pair with this desktop
5. Mobile app shows "Pairing failed" every time, no connection ever established

Claude Desktop Version

1.30096.5 (confirmed latest as of 2026-08-17)

Operating System

Windows 11 Home, Build 10.0.26200 (same build family as #57745, which was Windows 11 Pro 25H2 Build 26200.8328)

Troubleshooting Already Attempted

• Confirmed Dispatch toggle is ON in Settings → Cowork
• Confirmed same account signed in on mobile and desktop
• Confirmed plan is Pro (not a plan-tier issue)
• Fully quit and restarted Claude Desktop app, retried pairing
• Disconnected active Tailscale VPN on both desktop and mobile (both were connected to the same tailnet), retried pairing
• Verified outbound HTTPS connectivity to claude.ai and api.anthropic.com (both succeed)
• Verified no third-party antivirus/firewall product installed (Windows Defender only), with existing Windows Firewall rules allowing Claude inbound/outbound
• Verified Ethernet network profile is set to "Private" (not Public), which is the correct category for local discovery
• Verified Windows network discovery services (FDPHOST, FDResPub, SSDPSRV) are running
• None of the above resolved the issue — pairing fails identically every time

Additional Information

This appears to match the exact unresolved symptom in #57745 and #45937, which were closed by inactivity, not by a fix. Filing this as a fresh report since the underlying bug appears to still be present on current builds/versions as of August 2026.